Morphological characteristics and phylogenetic analyses revealed three new wood-inhabiting fungi (Agaricomycetes, Basidiomycota) in Southern China

Abstract

Fungi are one of the most diverse groups of organisms on Earth, among which wood-inhabiting fungi play a crucial role in ecosystem processes and functions. Three wood-inhabiting fungi belonging to the genera Ceraceomyces, Stereopsis, and Xenasmatella were found in Southern China. Combined with morphological characteristics and molecular biological evidence, the present study describes them to be new fungal taxa Ceraceomyces yunnanens, Stereopsis yunnanens, and Xenasmatella bambusicola. Ceraceomyces yunnanens is distinguished by the resupinate basidiomata with merulioid hymenial surface, monomitic hyphal system and cylindrical basidiospores; S. yunnanensis is characterized by the laterally stipitate basidiocarps with greyish brown to brown pilei, monomitic hyphal system and subglobose basidiospores; and X. bambusicola is characterized by the resupinate basidiomata, arachnoid hymenophore with white to greyish hymenial surface and warted basidiospores. Sequences of ITS and nLSU rRNA markers of the studied samples were generated, and phylogenetic analyses were performed with maximum likelihood, maximum parsimony, and Bayesian inference methods. The phylogenetic analyses of ITS+nLSU showed that three new species nested into families Amylocorticiaceae, Stereopsidaceae and Xenasmataceae (Agaricomycetes), in which C. yunnanens grouped sister to C. borealis; S. yunnanensis grouped with S. radicans; and X. bambusicola grouped sister to X. xinpingensis.

Untitled

“…Wood-inhabiting fungi are an extensively studied group of Basidiomycota (Dai et al 2015, Justo et al 2017, Xu et al 2020, b, Wang & Cai 2023. During the investigations of wood-inhabiting fungi, more and more samples of Polyporales were collected in tropical and subtropical regions of Eastern Asia , Han et al 2020, Gu & Zhao 2021, Wang & Zhao 2022, Dong et al 2022, Li et al 2023a, b, Duan et al 2023, Yuan et al 2023, Zhang et al 2024. We believe that more species of Polyporales will be found in the oriental realm since wood-inhabiting fungi are a cosmopolitan group and they are rich in this area (Tedersoo et al 2014, Dai et al 2015, Hibbett et al 2016, Guan & Zhao 2017, James et al 2020, Wu et al 2020, Zhou et al 2021, Wang & Cai 2023 and it is very possible that the same phenomenon occurs for Rhodoantrodia and Steccherinum.…”

Morphological characteristics and phylogenetic analyses revealed four new wood inhabiting fungi (Agaricomycetes, Basidiomycota) in Xizang Autonomous Region, China

“…Previous research has highlighted the polyphyly of Ceraceomyces ( Chikowski 2016 ; Yuan et al 2023 ), and seven species are retained in Ceraceomyces . However, it is worth noting that authentic specimens and DNA data are lacking for Ceraceomyces species.…”

“…However, it is worth noting that authentic specimens and DNA data are lacking for Ceraceomyces species. Phylogenetically, C. rhizomorphus formed a sister group with C. yunnanensis and C. borealis , but C. yunnanensis has smaller basidiospores (3–4 × 1–1.5 µm vs. 4.7–6.2 × 1.8–2.3 µm, Yuan et al 2023 ) and C. borealis has larger basidiospores (6–8 × 1.8–2 µm vs. 4.7–6.2 × 1.8–2.3 µm, Bernicchia and Gorjón 2010 ).…”

“…Zhao and C. borealis (Romell) J. Erikss. & Ryvarden ( Yuan et al 2023 ). Currently, eleven species are recognized in the genus Ceraceomyces , including C. cystidiatus (J. Erikss.…”

Figure 10 from: Zhou H-M, Zhang X-C, Li J-T, Wu F, Zhao C-L (2024) Morphological characteristics and phylogenetic analyses revealed four new wood inhabiting fungi (Agaricomycetes, Basidiomycota) in Xizang Autonomous Region, China. MycoKeys 106: 201-224. https://doi.org/10.3897/mycokeys.106.125831

“…Zhao and C. borealis (Romell) J. Erikss. & Ryvarden (Yuan et al 2023). Currently, eleven species are recognized in the genus Ceraceomyces, including C. cystidiatus (J. Erikss.…”